2053781949851 has 16 divisors (see below), whose sum is σ = 2089638053568. Its totient is φ = 2018235648000.

The previous prime is 2053781949823. The next prime is 2053781949881. The reversal of 2053781949851 is 1589491873502.

It is a cyclic number.

It is not a de Polignac number, because 2053781949851 - 2²⁶ = 2053714840987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2053781949881) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 105026891 + ... + 105046443.

It is an arithmetic number, because the mean of its divisors is an integer number (130602378348).

Almost surely, 2^{2053781949851} is an apocalyptic number.

2053781949851 is a deficient number, since it is larger than the sum of its proper divisors (35856103717).

2053781949851 is a wasteful number, since it uses less digits than its factorization.

2053781949851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27382.

The product of its (nonzero) digits is 21772800, while the sum is 62.

The spelling of 2053781949851 in words is "two trillion, fifty-three billion, seven hundred eighty-one million, nine hundred forty-nine thousand, eight hundred fifty-one".